Assembling apparatus



June 14, 1932. A. w. PHELPS ET AL ASSEMBLING APPARATUS Filed March 6, 1930 10 Sheets-Sheet l fui-...EEE.

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ASSEMBLING APPARATUS Filed March 6, 1930 10 Sheets-Sheet 7 June 14, 1932. A. w. PHELPS ET AL 1,863,314

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. June 14, 1932. A. w. PHELPS ET AL.

ASSEMBLING APPARATUS Filed March 6, 1930 10 Sheets-Sheet 9 Nl v *Mffmx June 14, 1932. A. w. PHELPS ET Al.

AS S EMBLING APPARATUS Filed March 6, 1950 10 Sheets-Sheet lO Patented June 14, 1932 STE-iii LVA XV. PEJIELE'Q. AND NGRZL'LN PENN, OF ANDERSON, INDIANA, ASSIGNORS TO TA REk .ASSEMBLING APPARATUS Appncation eigenaren e, 1930. sei-iai No. 433,677.

rl'his invention relates to the art of assembling fastening` devices, such as screws, with parts'tobefassembled, and particularly with parts; each having a recess provided near one edge thereof for Vvreceiving Vthe head ol" a screw whichis passed into the recess by side- *it of the screw, thus leaving the threaded portion of the screw projecting beyond the part to provide a threaded projecltion by whichthe part may be assembled with another' part having a hole Jor receiving Lthefvscrew.- The screw receives a nut by l which the parts may be secured rigidly togetherby tightening the nut on the screw. y It is an'object of the present invention to provide power means for assemblingl screws and parts, and to provide means for automatically feeding the screws from a hopper to a. device which pushes the screws laterally 2'3 so that a screw head will be forced into the screw head receiving recess oi. the part to which the screw is to be attached. The disclosed embodiment of the present invention is particularly adapted for attaching a screw to each leg. or a U-shaped bracket adapted to be used asa field frame of a small electric motor, for example, a motor used to operate an automobile horn such as shown in the copending application oi" R. M. Critchiield, Serial No. 112,268 filed May 28, 1926. Each leg of the frame is provided with a notch adjacent the edge thereof. Each notch is dovetail in contour and receives a similarly shaped head of a screw, the head being slightly greater in dimensions than the dimension of the notch requiring that the screw head be press-itted into the recess ot the trame. It is desirable that the threaded shank of the screw be about equal in diameter to the thicke nessot the sheet metal part to which it is attached. It is, therefore, desirable that the head of the screw have a thickness (dimension taken at right angles to the dove-tail shaped tace fitting the recess in the frame) which is substantially equal to the thickness of the head of the frame which receives the screw In ord-er that the screws will be'ied in only one manner, to the frame into which the head of thescrew is inserted, the present 53 VAinvention provides an automatic screw feeding apparatus having devices which will per.- mit screws to pass from a screw containing hopper through a gate which permits the screw to slide flatwise only, into a chute which delivers the screwto a second gate or device for passing only such screws as point in a certain manner, for example, the second gate may pass only the screws whose threaded shanks point downwardly as they descend from the hopper to the second gate. Those screws which point upwardly are automaticallyremoved from the feeding mechanism so that the chute which finally delivers the screw to the power operated device for assembling it with the bracket or frame, contains only screws ywhich point in a certain direction and which are so located that the flat sides or the screws are substantially in the same plane where they enter the assembling levice.

Another object of the present invention is to provide a safety device for preventing operation o the power operated assembling device unless the frame to be assembled with the screw is located in proper position for receiving' the screw.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to theV accompanying drawings wherein a prefenredv embodiment of one form of the present invention is clearly shown.

ln the drawings z Fig. l is a. fragmentary,perspective view of the lower part of the machine embodying the present invention showing the power operated device tor assembling simultaneously a screw with each leg of a U-shaped frame.

Fig. la is a perspective view ofthe U-shaped frame before assembling .screws therewith. the screws also being shown in perspective.

Fig. 1b is a perspective view of the frame with screws assembled.

Fig. 2 is a perspective view of the upper portion oi the machine showing the devices for automatically feedingA screwsfrom two separate hoppers into separate chutes through which screws. aredelivered in the proper mannerto the assemblingA device shown in Fig. 1.

assembling device looking in the direction Vof the arrow 7 of Fig. 1.

Fig. 8 is a side view thereof partly in section, the .section being taken on the line 8 8 of Fig. 7. y

Fig. 9 is a diagrammatic right side elevation of the machine showing vonly that part which relatesftothe safety device for preventing operation of the power assembling device. in case the U-shaped bracket is not 1ny proper position. That part of Fig. 9 Vshown in section .is taken on the section line 9-9 of Fig. 10.

Fig. 10 is a Ysectional view on theline 10-10of Fig. 9.

Figs. 10a and 10bare fragmentary" s.ec tional views on line 10a-10a of Fig. 10 and show the clutch parts in different positions'. These views are drawn to a larger scale than Fig. 10. J 1 i Fig. 1,1 is a plan view, partly broken away, of one of the hoppers from which screws are fed automatically Vto the assembling device. Fig. 12 is a front elevation thereof, partly broken away. v

Fig. 13 is-a side view looking in the direction of the arrow 13 of Fig. 12.l

Figs. 14 and 15are sectional views taken respectively on the lines 1/4-14 and 15-15 of Fig. 12.

Fig. 16 is a plan view of the device which automatically passes only such screws as descend from the hopper with the threaded Shanks pointing down and ejects those which descend head first. This view is partly in .section taken on the line 16-16 of Fig. 2.

. to be delivered Fig. 17 is a sectional view on the line 17-17 of Fig. 2. Fig. 18 is a fragmentary sectional view similar to Fig.'17, showing certain movable parts in another position.

18a is a sectional view on the 18a-18a of Fig.v18. i Y

Fig. 19 isa sectional view on VVthe line 194419 of Fig. 18 sho* ing a screw which has line "- descended point first into the position for passing the second gate into a chute throngh which the'screw must .descend point first only. *Y

Fig. 19a is a fragmentary sectional view on line 19a-19a of Fig. 19.

Fig. 2O is a sectional view on line 20-20 ofV Fig. 17 and shows how' the screw men tioned in the preceding paragraph is caused point first into theoutlet chute. v

Fig. 21 is a view similar to Fig. 19, show ing a screw that has descended head first from the inlet chute.

Fig.v 22 is a view similar to Fig. 20, show# ing how the screw which` descended head first in Fig. 21, is ejected from the' feeding apparatus. n

Figs. 23 and 24 are views similar to Figs. 16 and 17 respectively, showing a modified form of apparatus for passing only such screws as point in a certain direction.

Fig. 24 is a sectional view on line 24-24 of Fig. 29.

Fig. 25 is a sectional view on line 25-25 of Fig. 23, or line 25-25 of Fig. 26.

Figs. 26, 27, 28 and 29 are views similar in description to Figs`.19,..20, 21 and 22 respectively, and show the InodeV of operation of the..mcdilied form of feeding device as shown in Figs. 23, 24 and 25.

Referring to Fig. 1a the operations performed bythe machine shown in Figs. 1 and 2 are that of assembling screws A and B .with the branches of a U-shaped frame C having in each branch a notch D adapted to receive a head of a screw, the screw head b'eingpress-itted into the notches D by moving the screws A and B respectively, in the directiony of the arrows ce and b. Fig. 1b shows the screws A and B assembled with the frame C.

Screw cmd frame assembling apparatus rThe apparatus for assembling the screws 'A and B with the frame C is operated by a punch press40, having a base plate 4l,

to` which a work holder 42 is `att-ached inV block 43 about which the frame C is posi-` tioned, as shown in Fig. 1. It will be noted that one branch C1 of the frame C is vflat and the other branch of the frame C2 is cylindrical. Hence, the center block is provided with a plane surface-44 adjacent which the leg C1 is placed, and the block Y43Y has a cylindrical surface 45 adjacent to which the leg C2 is placed. Block 43 is covered partly by a. plate 43a. Referring to Fig. 3, it will be seen that the space 45immediately adjacent the surface 44 is adapted to receive the legy Gland the space 47 adjacent the surface 45 is adapted to receive the leg C2. vrllhe screws A. and B are caused to descend chiites, to be described later, terminating in screw receiving pocket members 48 and 49 having covers 50 and .51 respectively. Referring to Fig. 5, it will be seen that the lower most screw A has its point received by notch 52. in a block 54.,.which serves to locate the screw in proper position so that its head will be in alignment with the notch D of the leg C1 when the VU-shaped frame is in proper position. The lower most screw B is located and 55 are attached' to brackets 56l and 57 respectively, having rectangular notches 58 and 59 for receiving slides 60 and 6r respectively.l Plates 56u and- 57a cover the blocks 56 and 57 respectively with their notches 58 and 59 and the slides 60 and 61. Each slide r60l and 61 is adapted vto move through the notches of the blocks 511 and 55 respectively, in order to move.A the screws A and B respectively,-into the notches of the frame legs C1 andvCZ, respectively, when these legs are received by the spaces-L6 and' 47. This action, however, cannot tal-e placer until the frame C has been located shown' in Fig. 1 and has been pushed along the base block 42o of the work holder 42 sufliciently to cause the trame legs C1 and C2 toe.ngiage respectively, the legs 62 and 63 of a U-shaped trame having a yoke 64 and to cause said trame to move until its yoke is in the position shown at 64a in dot-and-dash lines in Fig. 3. When this occurs, the legs 62 and 68 will have moved sufliciently so that their notches 66 and 67 respectively, will have been moved into alignment with the screw point receiving notches of the blocks 511 and 55 ont of alignment with the heads of the screws in order to permit the screws to be moved laterally. Fig. 6 shows the leg 62 with its notch 66 in normal position. One of the screws A is shown in dot-and-dash lines. At will be seen that normally the leg 62 provides a gate obstructing the movement laterally of the screw A until the gate has been moved into position 62a in Fig. 6 indicated by dot-and-dash lines. Now when the gate has been moved by the work piece C so that its yoke 64 has arrived at the position 6110 a clutch4 control latch out lever 68 pivoted at. 69, will be moved against? the acof the spring 70 from the lull line position shown in Fig. 8 into the dot-dash line position 68a whereupon the end 69 ot the lever 68 will be retracted from a notch 70 in vertically movable bar attached tothe clutch control pedal to be described.

rlfhe power driven ily-wheel of the punch press is loosely ourna-lled on the punch press shaft 81, which is journalled in bearing 82 and has a` crank 88 connected by a crank rod 84 with a vertically reciprocating head 85 carrying a plate 86 to which cams 88 and 89 are attached. During downward movement ot the head the cams 88 and 89 engage the outer ends of the slides 60 and 61 respectively, in order to cause them-to move simultaneously toward the center block'll and press littingly to force the heads of the screws A and B respectively,into the notches of the legs Clvand C2. During upwardmovement of the head 85, the slides 60 and 61 are permitted to return to normal position by springs 90 and 91 respectively, each loc-atedin an elongated hole in a slide and bearing at one end against the outer end portion of the slide and at the pocket so that the lower most screw will be received by a screw receiving block 54, 55

.ready for the next operation.

The assembly of trame and screws shown in Fig. 1b is automatically ejected from the work holder by a mechanism operated by the upward movement oit the head 85. The plate 86 attached tol the head 85, carries a bifurcatcd bracket 95 pivot-ally supporting at 96 a latch 97 urged in a counterclockwise direction as viewed in Fig. 8 by spring 98 having its end attached respectively to the latch 97 and a stud 99 attached to the bracket 95. The ends of a pin 100 project beyond the sides of the latch 97 which is only slightly less in thickness than the notch 101 which receives the latch, hence the pin 100 operates to limit rotation ot the latch 97 into the position shown in 'full lines in Fig. 8. The latch 97 cooperates with an ejector lever 102 pivoted at 103 upon a bracket 104- attached to the l plate L11. The lower end 102e. ot' the lever 102 is adapted to engage the head 105 of an ejector rod 106, which slides through an opening 107 in the center block 48 and which is attached at its front end to an ejector pad 108 adjacent which the yoke of the frame C is located when properly position-ed in the work holder, as shown in F 1. A spring 109, located between the head 105 and the shoulder 110' provided by the center block 43, operates to hold the ejector rod in normal position as shown in full lines in Figs. 3 and 8. Vhen the plate 86 descends, the latch 97 will strike the lever 102 at the point 102e, thereby tending to move the lever 102 clockwise as viewed in Fig. 8. Since this motion cannot take place on account of the bracket 1011, the latch 97 will be cammed into a relative position shown at 97a, so that the latch 97 may clear the lever 102 and finally be returned to' normal position by the spring 98 when the latch has cleared the point 102?) oil the lever 102. During upward movement of the plate 86, the latch 97 comes into a position 97o shown in Fig. 8 into which it begins to litt the upper end ot the lever 102 and finally Causes the lever to move into the position 1020 by the time the latch has arrived at the position 970. counterclockwise, the ejector A ad is caused to move toward the right into position 180e shown in Fig. 8, in order to eject the assembled work from the work holder. The work having been removed, the spring 70 is permitted to return the lever 68 into position Jfor entering the notch 70 of the rod 71 at the time that the throwing out of the clutch takes place and the machine comes to rest. As the branches of the frame C ft their respective,

Thus, by moving the lever 102y Lv-ca lao it is not necessary to hold the frame C in the work holder during the assembling operation there being sufficient friction between the branches of the frame and the side walls of the center block 43 to overcome the spring 70 so that the lever 68 will occupy the position 68a without requiringthe operator to push.

the work toward the center block during the screw assembling operation.

Referring to Figs. 9, 10, 19a and 10b, the clutch control will now be described. rllhe power fly-wheel is connected with the crank shaft 81l of the punch press by a clutch comprising a pin to enter a notch 111`in a clutch collar 112 attached by key 113 to the shaftv81. This is accomplished by pressing a lever 114 in the direction of the arrow 115.

VThe lever 114 being pivoted at 116, causes a link 117 to move downwardly and produce a corresponding downwardv movement of a lever 118 pivoted at 119 to which link 117 is connected and downward movement. of a rod 120 connected with rod 118 and pivotally connected at 121 with a rod 122vslidable in a bracket 12,3 and urged upwardly by spring 124. Theupper end of the rod carries a Vclutch pin throughout cam having a lug ywill release the pedal 114 a short vinterval after the clutch has been disengaged and certainly before the end of one revolution of the shaft 81 in order to prevent a repeat operation upon tlie same piece of work. As soon as pin 110 is urged by spring 131 to move Yinto the recess 111 of the clutch collar 112,

pin 110 engages al hardened steelpin in the clutch collar 112 and thus takes the clutch collar and also shaft 81 for one revolution as the latter is fastened to the crank shaft 81 by key 113. The pedal .being released, the spring 124 will return the cam 125 to normal position whereupon its camining edge 125e will engage the left hand end of vthe pin'110 in order to move it from the position shown in Fig. 10brto that shown in Fig. l10a. in which la terposition the pin 110 is disengaged fro-inthe clutch collar 112 and will be latched in such position by the latch 1.28v

which is'returned by the spring 129. ltwill be understood that this clutch does not per se constitute a part of the present invention, but is explained in `conyunction with the safety device for preventing operation' of the clutch except when the work is properly located in thewvork holder. Other types of clutches could be substituted for the one illustrated, for example, a clutch which will not permit of a repeat operation unless the clutch pedal be returned to normal position.

Autoriteit@ screw feeding mechanisme-device for passing screws ,itat/wise only Referring to Figs. 11 to 15 inclusive, the mechanism for feeding the screws in a certain fashion from a hopper will now be described. Referring to Fig. 2, it will be seen that the machine provides hoppers and 141 from which screws are permitted to pass flatwise only into chutes 142 and 143 respectively, which pass the screws yinto a selecting device 20() from which only those screws which descend point rst through the chutes 142 and 143 are permitted to pass respectively, into chutes 148 and 149, which Jrerniinate in the chute pockets 43 and 49. As the devices permitting the Vscrews to pass only iiatvise from the hoppeis, are alike, only that device associated with hopper 140 will be described.y Referring to Figs. 11 to 15, the hopper 140 is mounted on a stand 150 attached to a bracketll which in turn is attached a bracket 152, supporting the motor 153, which drives the fly-wheel gearSO of the punch press. The bracket 151 supports a small electric motor 154 which drives a shaft 155 connected by reduction gearing in al hoppers 140 and 141 respectively. The puli' ley has a hub 162 mounted on a stationary shaft 163 having a reduced threaded end 164 projecting through a bracket 165 integral with the hopper 140, and receiving a nut 166 by which the shaft 163 is clamped to the l" bracket 165. The pulley 160 provides an enclosure for an open side of the hopper 140 through which screws may pass into engagement with the plane circular wall 167 of the pulley and be picked up by the vanes or pad! dles 168 and be dumped upon a stationary circular disk 169 attached by screws 170 to the bracket 165. Siiicethe hoppers 140 and 141 respectively, contain the screws for feeding the screw pockets 48 and 49 of the worin holder, the screws of which have previously been mentioned as screws A and .B respectively, the screws in hopper 140 are referred to as screws fi. and those in hopper 141 as screws B, although these screws are identical. Vlhe bracket carries plate 171 located Y adjacent the cylindrical part 169 and having downwardly inclined beveled edges V172 and 173. A portion of the cylindrical part 169 is cut away to provide a notch defined by an of the. pulley 160 and which is triangular in ioo plan view as viewed in Fig. 11, as designated by the lines m-n, vrif-0, and o-n in Fig. 11. This surface 174 is in the Same plane with the top surface lof the bar 171. VThe oblique surface deiined by line m-n in Fig. 11 and desiofnated bv innneral 180 carries small angle plate 131 the lower leg 132 ci unich 1s spaced above the surface 174 oi the cyliw drical part 169 and above the top surface .17 5 olf' the bar 171, a distance only to permit the head of a screw A to pass latwise d along the surfaces 174 and 175. 1n i 14 and 15 the head oi the screw A is represented by the small. .dot-andfdash rectangle y AH. The parts 174, 17 5 and 182y therefolre,

rotating in the direction ol the arrow 191 or opposite to that in which the screws descend and such a screw will 'be ejected from the surfaces 174 and 175 and be returned to the hopper. The toothed wheel 19.0 is mounted Ona shaft 1.92 journalled in a bearing 193 integral with the hopper 140 and carrying a pulley 194 driven lby belt 195 which passes around a driving pulley 190 4carried 'by shaft 1 57. Pulley 194 is connected also with a pulley 197, and 'in turn connected vby a belt 19,3 with a. pulley 199, which drives a similar screw ejecting device located in the hopper 141. ln this way only such screws as will pass atwise past the gate provided by .the parts 174, 175 and 182 in Fig. 14, and 175 and the cylindrical periphery 175m olf' the wheel 190 are permitted to descend through thel chute 142,. In a similar way, the screws in the hopper 141 are permitted to pass only flatwise through the chute 143.

Automatic .screw feeding mechanismalanine ,for passing screws point dorian only The selecting device 200 shown in Figs. 1G to 22 inclusive, provides a termin-us for the chutes 142 and 143. As the treatment of the screw descending in these chutes'to the selecting device is the same with respect to the screws in either of the chutes 142 and 143, the operation of the selectin-g device will be described only with respect to those screws A which descend through the chute 142. Referring firs-t to Fig. 19, it will be seen that a. screw 11 4has descended point lirst upon a shelf 201 having a shank 202 guided -by recess 203 located between the llower end ol the chute 142 and a selector i'rame 204. A spring 205 located in the recess 203 and surrounding a rod v206 urges the shelf 2,01 upwardly into the position shown in Fig. 19. The rod 206 passes through a plate 2,07 secured to the lower side of the `frame 204 and the lower end ,of the chute 142. The rod 206 has a head 208, which when striking the lower end of the plate 207, limits upward movement of the shelf 201. The ecrev. .ai faces toward the right, a pasf sageway shown more clearly in Fifi'. 13a, be- .ri'i, .n projec .ng walls 210 and 211, spaced apart sulliciently to permit the threaded shank of the screw to pass through but not tl e head All. rilhe walls 210 and 211 do not extend to the. ceiling 212 of the passage adjacent to which the passage is enlarged at 2113 to permit the bead All pass through toward the right, las viewed in Fig. 19. The screw A shown in 19 cai fl to turn into the position A? and nally into the horizontal position A2 shown in Fig. 20, by a sliding bar 220, provided with a pointed end 221 ada .ted to engage the screw about half way between its ends. 1When a downwardly pointed screw is engaged by this point 121, the screw will be moved `from the position A shown in Fig. 19, to the position A2 shown in Fig. 20 and will 'be pushed by the shoulder 222 of the slide bar 220 in to the lchute 148 the entrance to which is provided by a block 223 attached to the terminus of the chute 142.

It -will be noted that only one screw is handled at a time by the selecting mechanism. The screws above that o ne which rests on the shelf 201 are maintained in an elevated position in the chute 142 by a plunger 230 guided by the block 204 and urged by a spring 231 into the chute 142 Vso as to engage any spring held therein. During the movement oi the bar 220 toward the right from the position shown in Fig. 19 to that shown in Fig. 20 for the purpose of moving downwardly pointed screws into the chute 148, the screws which were elevated in the chute 142, as shown in Fig. 19, are permitted to descend so that by the time the slide 220 has arrived at the position shown in Fig. 20, the lower most screw in the chute 142 will rest upon Vthe upper side oi' the slide 220, the retraction of the clamp 230 is effected during the movement of the slide 220 toward the right. lSlide 220 carries with it a bracket 232 to `which a stop screw 233 is adjustably secured Vand locked by a lock nut 234. The screw 233 engages the bar 235 having a recess 236 to receive one end of a lever 237 pivoted at 238 in block 204, having its upper end received by a recess 239 in the clamp bar 230. Therefore, during movement of the slide 220 into the position shown in Fig. 20

he clamp bar 230 will be released to permit the screws in the chute 142 to descend until the lower one rests upon the top of the slide 220. During the next movement of the slide 220 toward the left into the position shown in 21, the screw 233 will 4move away from the bar 235 a distance sufficient to permit the spring to press clamp 230 to return into gripping position, as shown in Fig. V21,

before thetop surface of thelslide 2,20 has the shelf 221. Suppose that this time the screw upon the shelf 201 is head downward, as'shown in Fig. 21. The head AH of the screw A is now located in alignment with the walls 210 and 211 shown in Fig. 18a. Since these wallsare spaced apart a distance less than the extreme width of the head AH as viewed in Fig. 18a, the screw A cannot 'swing in a counter-clockwise direction as did the screw A shown in Fig. 19. Therefore,

, during movement of the slide 220 towardthe right into the position shown in Fig. 22, the point 221 of the slide will cause the screw A, which is head downward, to turn clockwise, as viewed in Fig. 21, falling as indicated at A3 upon the shelf 201. Thekslide 220 has Ya beveled camming surface 240 which is adapted to'engage a shoulder 241 provided by the shelf 201. The surface. 240 begins to engage the shoulder 241 shortly after the screw A has been caused to fall sidewise upon the top of the shelf, this position ofthe surface 240 being indicated at 240a vin Fig.21. As the camming surfacev240 moves from position 240@ to 2405 in Fig. 22, the shelf 201 is pushed down below the channel 242 so that the screw may bevpushed bythe slide 220 into the position A4, from whence it is permitted todrop as indicated at A5.

It will be noted that the selecting device operated by the slide 220 causes the screws to be ejected point first into the channel 242r as wellY as into the chute 148. It is, therefore.` apparent that lif it were always possible that the screw which came down the chute 142 head first were the same in number as those selecting device Vcould operate to keep two chutes filled leadinggto the screw and frame assembling device on the head of the punch press. It has been found by experience that about 80% of the screws of the type shown,

come down the'chute point first, hence, the screws ejected through the channel 242 would be about on'e fth the number of screws passed through the chute 148. Hence, it is necessary to have two selecting devices for receiving screws from the chutesv 142 and 143 and for filling the chutes 148 and 149 with screws pointing downwardly.

The slides 220 of both selecting devices arey attached to a pin 250 to a link 251 pivotally connected at 252 with a stud 253 attached to a lever 254 pivoted at 255 upon a bracket 256 attached to the bracket 151 andhcarrying a roller 257 bearing against a cam258 attached to shaft 157. v Shaft 157 rotates inthe direction of the arrow 259 and the cam 258 causestheslides 220 to move toward'the left awayV from the screw. The slides are actuated by springs 260 toward the chutes so that if any of the screws jam and clog the selecting apparatus, the mechanism will not be injured, since the slides 220 are not positively actuated intol selecting position. rlhe springs 260 are att-ached to the rod 250 and each to a hook screw 261 attached to the selector frame 204.

ln the modified form of selecting device shown in Figs. 23 to 29 inclusive, a pusher bar 27 0 pushes the screws one at a time through a passage 272 and a frame block 271 attached to the frame 204 of the selector. Referring to Fig. 25, the passage 272 includes a portion V272s sufficiently wide to permit passage of the heads of the screws therethrough and a passage 272?) located between surfaces 273 and 274 which Vare spa-ced apart in amount only slightly in excess of the diameter of the 'threaded portion ofthe screw. 'Belowthe ward the right from the position shown in Fig. 26 to that shown in Fig. 27, it will be caused to move through passage 272, the head of the screw resting upon the ledges 275 and 276, which support any screws which may be placed thereon until they have vbeen pushed into the chute 1480s through which they descend point first. Referring to Fig. 27, it will be seen that during movement of the pusherbar 270 toward the right, the latch y230 has released the screws in the chute 142 and that the lower most screw A1 is resting head down upon the upper surface of the bar 27 0. During the nent movement of the bar 270 toward the left into ythe position shown in Fig.

28, the screw A1 descends into the position A2 Vwhile the other screws in the'chute 142 are prevented fromdescending by reason of the engagement of the clamp 230 with the screw next above the screw A2. During movement of the pusher bar 27 0 toward the right into the position shown in Fig. 29, the screw A2 will be pushed ofi the ledge 277 and it will fall as indicated-by A3 in Fig. 29 through the passage 2720.

For reasons already given, the modified a preferred forni, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

l. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination, a Work holder for holding the part, means for locating the screw with its axis parallel to the longer axis of said part and means for pressing the screw sidewise from this parallelposition into one in line with the part in which it is to be inserted to cause its head to enter said recess in suoli a manner that he axis of the screw is coaxial with the longer axis of said part.

2. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination, a. work holder for holding the part, means for locating the screw with its axis parallel to the longer axis of said part, means for pressing a screw sidewise from this parallel position into one in line with the part in which it is to be inserted to cause its head to enter said recess in such manner that the axis of the screw is coaxial with a longer axis of said part and means for feeding screws to said screw pressing means.

3. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination, a work holder for holding the part, means for locating the screw with its aXis parallel to the longer axis of said part, means for pressing a screw sidewise from this parallel position into one in line with the part in which it is to be inserted to cause its head to enter said recess in such manner that the aXis of the screw is coaxial with a longer axis of said part and means for ejecting the part from the work holder.

ll. Apparatus for assembling a screw with .at having` a recess for receiving the head e screw, comprising in ccmbination, a rl` holder for holding the part, means for pressing a screw sidewise to cause its head to enter said recess and ymeans for preventing operati n of the screw pressing means unless the part is properly located in the work holder.

5. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination.v a work holder for holding the part, means fer locating the screw with its anis parallel to the longer axis of said part, means for pre ing a screw sidewise frein this parallel po 1 tion into one in line with the part in which it is to be insertecL to canse the head to enter said recess in such manner that vthe axis the screw is coaxial with a longer asis of said part, means for feeding screws to s pressing means, and means for ejecli part from the werk holder.

6. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination, a worlr holder for holding the part, means for pressing a screw sidewise to cause its head to enter said recess means for feeding screws to said screw pres `^g means, and means for preventing operation of the screw pressing means unless the part is properly located in the work holder.

Y. Apparatus for assembling' a screw with a part having a recess for receiving the head of the screw, comprising in combination, a worl; holder for holding the part, means for pressing screw sidewise to cause its head to enter said recess, means for feeding screws to said screw pressing means, means for ejecting the pari' from the work holder, and means for prev ag operation of the screw pressing means unless the part is properly located in the work holder.

El. Apparatus for assembling a screw with a aart having a recess for receiving the head of the screw, comprising in combination with a punch press having a horizontal bed and a vertically movable head, a work holder mounted on the bed for holding the part, and means operated by die punch press head for pressing a screw sidewise to cause its head to enter said recess.

9. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination with a punch press having a horizontal bed and a vertically movable head, a worlr holder mounted on the bed for holding the part, means operated by the punch press head for pressing a screw sidewise to canse its head to enter said recess, and means for feeding screws to said screw pressing means.

lO. pparatus for assembling a screw with a part having a recess for receiving the head of the screw, coniprising in combination with a punch press having a horizontal bed and a vertically movable head, a work holder mounted on the bed for holding the part, means operated by the punch press head for pressing a screw sidewise to cause its head to enter;` said recess, and means operated by the punch press head for ejecting the part from the work holder.

ll. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination with a punch press having a horizontal bed and a vertically movable head, a work holder mounted on the bed for holding the part, means operated by the punch press head for pressing' a screw sidewise to cause its head to enter said recess, and means for preventing the operation of the punch press unless the part is properly located in the worlr holder.

l2. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination with a punch press having a horizontal bed and a to said screw pressing means, and means operated by the punch press head for ejecting the part from the work holder.

13. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination with a punch press having a horizontal bed and a vertically movable head, a work holder mounted on the bed for holding the part,

means operated by the punch press head for pressing a screw sidewise to cause its head to enter said recess, means for feeding screws to said screw pressing means, and means for preventing the operation of the punch press unless the part is properly located in the work holder. l

14. Apparatus for assembling a screw with a part having a recess for receivingthe head of the screw,comprising in combination with a punch press having aliorizontal bed and a vertically movable head, awerkholder mounted on the bed for holding the part, means operated by the punch press head for press- 'ing a screw sidei 7ise to cause its head to enter said recess, means for feeding screws to said Vscrew pressing means, means operated by the punch press head yfor ejecting the part from the work holder, and means for preventing kthe operation of the punch press unless the part is properly located in the work holder.

` 15. Apparatus for assembling a screw with a part having a recess for receiving the head of the screw, comprising in combination, a

Vpart holding means, means for positioning the screw adjacent thepart so that sidewise movement of the screw will cause its head to be received by the part, means for pressing the screw into-the recess of said part, and means for `feeding screws to said screw positioning means, said feeding means comprising a screw containing hopper, a delivery chute and means for permitting screws which point in a certain direction only to pass down the chute to the screw ypositioning means.

16. Apparatus according to claim 15 further characterized by having means for ejecting screws which do not point in a certain direction as they pass through the chute. Y 17. Apparatus. according to claim 15 further characterized by having means for permitting screws which `point downwardly only to pass down the chute to the screw positioning means. i

18. Apparatus according to claim 15 further'characterized by having means for permitting screws which point downwardly only to pass down the chute to the screw positioning means and by having means for ejecting screws which point upwardly as they pass through the chute.

19. Apparatus for assembling a screw, having a laterally flattened head having a width dimensionV greater than its thickness, with a part having a recess adapted to receive the head of the screw, comprising in combination, a work holder for receiving the part, means for locating a screw with its head in lateral alignment with the recess of said part, means for pressing the screw head laterally into said recess, and means for feeding screws to the screw locating means and comprising a delivery chute, a screw containing hopper, means for causing screws to pass flatwise only'to the chute and means for permitting to pass through the chute to the screw locating means only such screws as point in a certain direction.

In testimony whereof we hereto aiiix our signatures. Y

' ALVA W. PHELPS.

NORMAN L. PENN.

isa

120.91 .tav 

